Georg-Johann Lay <a...@gjlay.de> wrote:
>> Could anyone explain this to me? Is there any way around this
>> (still using macros)?
> With macros? No way here.
Well: no way *at the preprocessor level*.
However, moving the comparison to the *compiler level* could work.
The values of e.g. DDRD and DDRB are expressions that can be compared
by the compiler. As the resulting comparison is constant at
compile-time, with optimization enabled, those code portions that can
never be reached (due to the compile-time constant comparisons) are
optimized away.
So, turn your
#if LED1_DDR == LED2_DDR
into
if (LED1_DDR == LED2_DDR) {
// ...
} else {
// both DDRs are not the same
// ...
}
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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